chromium/third_party/protobuf/src/google/protobuf/compiler/importer.h

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
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// modification, are permitted provided that the following conditions are
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//
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// notice, this list of conditions and the following disclaimer.
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// in the documentation and/or other materials provided with the
// distribution.
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// Author: [email protected] (Kenton Varda)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.
//
// This file is the public interface to the .proto file parser.

#ifndef GOOGLE_PROTOBUF_COMPILER_IMPORTER_H__
#define GOOGLE_PROTOBUF_COMPILER_IMPORTER_H__

#include <set>
#include <string>
#include <utility>
#include <vector>

#include <google/protobuf/compiler/parser.h>
#include <google/protobuf/descriptor.h>
#include <google/protobuf/descriptor_database.h>

// Must be included last.
#include <google/protobuf/port_def.inc>

namespace google {
namespace protobuf {

namespace io {
class ZeroCopyInputStream;
}

namespace compiler {

// Defined in this file.
class Importer;
class MultiFileErrorCollector;
class SourceTree;
class DiskSourceTree;

// TODO(kenton):  Move all SourceTree stuff to a separate file?

// An implementation of DescriptorDatabase which loads files from a SourceTree
// and parses them.
//
// Note:  This class is not thread-safe since it maintains a table of source
//   code locations for error reporting.  However, when a DescriptorPool wraps
//   a DescriptorDatabase, it uses mutex locking to make sure only one method
//   of the database is called at a time, even if the DescriptorPool is used
//   from multiple threads.  Therefore, there is only a problem if you create
//   multiple DescriptorPools wrapping the same SourceTreeDescriptorDatabase
//   and use them from multiple threads.
//
// Note:  This class does not implement FindFileContainingSymbol() or
//   FindFileContainingExtension(); these will always return false.
class PROTOBUF_EXPORT SourceTreeDescriptorDatabase : public DescriptorDatabase { … };

// Simple interface for parsing .proto files.  This wraps the process
// of opening the file, parsing it with a Parser, recursively parsing all its
// imports, and then cross-linking the results to produce a FileDescriptor.
//
// This is really just a thin wrapper around SourceTreeDescriptorDatabase.
// You may find that SourceTreeDescriptorDatabase is more flexible.
//
// TODO(kenton):  I feel like this class is not well-named.
class PROTOBUF_EXPORT Importer { … };

// If the importer encounters problems while trying to import the proto files,
// it reports them to a MultiFileErrorCollector.
class PROTOBUF_EXPORT MultiFileErrorCollector { … };

// Abstract interface which represents a directory tree containing proto files.
// Used by the default implementation of Importer to resolve import statements
// Most users will probably want to use the DiskSourceTree implementation,
// below.
class PROTOBUF_EXPORT SourceTree { … };

// An implementation of SourceTree which loads files from locations on disk.
// Multiple mappings can be set up to map locations in the DiskSourceTree to
// locations in the physical filesystem.
class PROTOBUF_EXPORT DiskSourceTree : public SourceTree { … };

}  // namespace compiler
}  // namespace protobuf
}  // namespace google

#include <google/protobuf/port_undef.inc>

#endif  // GOOGLE_PROTOBUF_COMPILER_IMPORTER_H__